Motor Phase Failure Detection - KEB COMBIVERT F6 Programming Manual

Protection functions

Motor phase failure detection

Phase failure detection checks the connection between the inverter and the motor.
There are 2 different procedures for failure detection:
•
•
4.4.20.1 Activation
Motor phase failure detection is mostly needed in combination with brake handling:
if there is a phase failure, the brake must not be opened under any circumstances.
Therefore the activation occurs in parameter
check.
However, a missing phase can also cause undefined behavior in applications with-
out a brake. For this reason, the function is also available independently of brake
handling. If bit 10 is set to "on", the phase failure detection is always activated.
The monitoring runs in the status "start operation active".
co21 brake ctrl mode
Bit Function Valu
e
0
phase
10
check
1024
4.4.20.2 Configuration
The mode (DC or high frequency signal) is selected in parameter
check
displayed in
Sub-
Index Name
Index
0 phase check control
0x251B 1 phase check mode
2 error level information
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DC signal
High frequency signal
Plaintext Note
off no phase check
Before the brake is released, it is checked whether all
three motor phases are connected. A phase failure is dis-
played in ru01
on
several causes, the reason is defined more precisely in
dr57 ident error
ctrl, (co27[1] phase check
(co27[2] error level
Function
Configuration of the motor phase failure detection
Selection procedure for failure detection
Detection quality
co21 brake ctrl mode
22: ERROR ident. Since this error can have
info.
mode) and an information about the test result is
information).
bit 10 phase
0x2515
co27 phase
89